Abstract

The use of roentgenology as an aid in the diagnosis of chest disease is now standard medical practice. Conservative physicians, be they internists, radiologists or chest specialists, are well aware of the fact that the bacteriological origin of the disease which produces a shadow in the roentgenogram cannot be determined from the roentgenogram alone. This important fact is sometimes lost sight of, especially by enthusiastic proponents of mass chest roentgen-ray surveys.

In order that physicians may have a convenient reference list of diseases, disorders and anomalies which may resemble pulmonary tuberculosis in the roentgenogram, that is, which may cast shadows